Detectors based on the PADC plastic, made by Pershore and TASL, were i
rradiated with protons, alpha particles, and monoenergetic neutrons fr
om an accelerator, and with broad-spectra neutrons from Am-Be and Cf-2
52 neutron sources. Latent tracks were etched in a two-step electroche
mical procedure and measured using an image analysis system. Track siz
e distributions were determined showing systematic changes with the qu
ality of charged particle spectra.